Change to double[] instead of Double[].


On 03/01/2016 20:50, Daniel Price wrote:
Sorry, code sample:

import org.apache.commons.math3.stat.correlation.Covariance
import org.apache.commons.math3.stat.descriptive.DescriptiveStatistics
import org.apache.commons.math3.util.*

Double[] dblArray1 = [0.00995630918100443,0.00425329233495364,-0.01227651365617033,0.015574186166315451] as Double[]
Double[] dblArray2 = [0.004630842339633734,0.003451971610807014,-0.008004809261582091,0.04068026756946197] as Double[]
def cov = new Covariance().covariance(dblArray1, dblArray2)
println "cov: $cov"

Result:
Exception in thread "main" groovy.lang.MissingMethodException: No signature of method: org.apache.commons.math3.stat.correlation.Covariance.covariance() is applicable for argument types: ([Ljava.lang.Double;, [Ljava.lang.Double;) values: [[0.00995630918100443, 0.00425329233495364,...
Possible solutions: covariance([D, [D), covariance([D, [D, boolean)

So, how would I create the proper array argument: [D,[D ?  Some Apache Commons Math type I need to cast my java.lang.Double to?

Any suggestions much appreciated!
D

On Sun, Jan 3, 2016 at 10:43 AM, Eric MacAdie <emacadie@gmail.com> wrote:
Could you give a code sample?

= Eric MacAdie


On Sun, Jan 3, 2016 at 11:37 AM, Daniel Price <danprice303@gmail.com> wrote:
Got this 2.4.5 Groovy error trying to perform a covariance calc:

groovy.lang.MissingMethodException: No signature of method: org.apache.commons.math3.stat.correlation.Covariance.covariance() is applicable for argument types: ([Ljava.lang.Double;, [Ljava.lang.Double;)

covariance() requires two double arrays, and that's what I provided, so what gives?

Do I need to cast the Groovy/Java array into another type?

Any advice is much appreciated!

D  






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